一种智能收扩机的控制程序，可以让收扩机按编码接收控制指令，具备10位不可更改物理地址码来识别终端身份，开关机操作时能够实现声音的渐强渐弱，即淡入淡出功能。-An intelligent control program and expanding machine, can let the expanding machine receives the control instruction according to the code, have 10 bit can not change the physical address code to identify the terminal identity, switch machine operation can achieve sound crescendo decrescendo, namely the fade in and fade out function.